oooooooo overclocking fun!!

H

helmie

New Member
Howdy,
Since ive finnaly got my temps under control, i thought id gor for the BIG 4GHZ!

Well, I got to 3.85, then took the leap to 4Ghz. It crashed.:P

I rebooted, and the blue screen of death appered, i knew it was my RAM, so into the BIOS and back to 800MHz FSB, works fine again.

Now, heres the frequencys standard:

FSB - 800Mhz
RAM - 667Mhz

O/Ced at 4Ghz:

FSB - 940Mhz
RAM - 783.3 MHz :eek: :eek:

Since my RAM is rated at 667, I think i went a little over :lol:

So, If i got a higher Frequency RAM (Corsair 1ghz :P ) Could I get a stable 4Ghz?

EDIT: The temp in the BIOS at 4Ghz was only 36 Degrees!
 
So, If i got a higher Frequency RAM (Corsair 1ghz :P ) Could I get a stable 4Ghz?
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Theoreetically yes, if you found that the RAM was the limiting factor then a higher frequency amy be feesable to achieve the 4Ghz boundary.... Although, you could make the timings slower on the RAM, taht may help you get to 4Ghz stable without needing to upgrade....

36 C at 4Ghz, thats quite amazing...
 
In the DRAM control menu, usually there's a memory divider option that is a fraction (9/10, 2/3 etc.) The lower the fraction, the slower your memory will run compared to your FSB.
 
No it doesn't lower the timings it lowers the Mhz, so your processor would be at 4ghz but you RAM could run at its rated speed of 667 mhz.
 
36 C at 4Ghz, thats quite amazing...
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Not nearly as amazing as that silliness i think i saw passing through this forum about AMD64 stock cooling with 18C load temps lmao.

So that basicly the same as lowering the timings?
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Its the same as lowering the clock.

Stay on topic guys.
 
Praetor said:
Not nearly as amazing as that silliness i think i saw passing through this forum about AMD64 stock cooling with 18C load temps lmao.
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How is that so hard to believe?

And just out of curiosity, do you have any PCI Cards in your machine?
 
helmie said:
Nope, no PCI cards, Just my PCI-E 6600GT (And i might be getting an XFX 6800GS VERY soon!)
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is the PCI-E frequency locked? I would assume so, since if it wasnt i bet your video card wouldnt be working, lol
 
How is that so hard to believe?
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Hmmm... cuz i'm not stupid? But i'll huimor this cuz its so silly its kinda worth it.

  • Let's see what we get when we take a Athlon64 4000 Clawhammer. Ok so lets have a look at what happens when we downclock the box to a mere 800MHz (for those not keeping track, thats a 67% underclock) ... we get a load temperature of 26.9ºC
  • Now many people will be packing high performance heatsinks as opposed to water or other exotic cooling methods... lets have a look at the performance of a few popular and very effective HSFs
    • Pairing a Athlon64 3500+ Venice with the Arctic Cooling Freezer64 Pro, we're looking at idle temperatures of 25ºC
    • An Athlon64 3000+ Venice with the Freezer64 Pro logs 23.4ºC at idle
    • AMD Athlon64 3500+ with a Vapochill Micro reports 33ºC but we can ignore it because the model being tested is the "low noise" model
    • A Athlon64 3500 Winchester + Thermalright XP90 + SilentCat9 fan scores 31ºC at idle
    • The Thermaltake Big Typhoon with a Athlon64 3200 scores 27ºC at idle
    • A Athlon64 3000+ Winchester with the venerable Thermalright XP90c + Panaflo HighPower fan scores 27ºCidle while another review tracks it at roughly 30ºC idle
    • Looking here we see that while it IS possible to get a load temp of 18.6ºC .. that requires an extremely high powered cooler running at 71db... hardly comparable to the AMD stock cooler
  • For those who put the time and effort into a watercooled rig, lets have a look
    • The ever so popular Thermaltake BigWater SE kit paired with a Athlon64 3200 (dont know what the core is so we can assume it's a Winchester as to give it the greatest benifit of a doubt although really it doesnt matter), we've got load temperatures of 45ºC. I suppose we could chalk it up to the combination of this being Thermaltake as well as it being a basic beginner's kit.
    • So lets have a look at a slightly more robust platform, say the Alpha Xtreme Pro WC kit paired with a nice and cold Venice 3000 we've got idle temps of 26ºC. Ok so that's two watercooling kits that inidicate that 18C isnt really feasible .. but let's be thorough
    • Athlon64 3500 Winchester + Cosair COOL WC kit with an idle temperature of 23ºC
    • Pairing a Athlon64 3500+ Venice with a Titan Bianca we've got idle temps of 34ºC
  • For those who've got more exotic solutions, lets have a look
    • Consider a Venice 3500 runnong a Monsoon TEC kit in a TT TaiChi case ... we've got idle temps of 26ºC
    • Zero-ish temperatures are of course possible with a Athlon64 3500+ Winchester paired with the Swiftech H20-120T TEC kit

To conclude: running 18C load (or less for that matter) on a current generation K8 with anything close to normal clock speed and a normal room temperature is impossible. To suggest otherwise would be outright silly and well deserveth of either a public mockery or an investigation by people who specialize in MOD/Thermo. :)

And just out of curiosity, do you have any PCI Cards in your machine?
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Depending on the machine you ask. Yes and no.
 
Let's see what we get when we take a Athlon64 4000 Clawhammer. Ok so lets have a look at what happens when we downclock the box to a mere 800MHz (for those not keeping track, thats a 67% underclock) ... we get a load temperature of 26.9ºC
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I thought ye of all clarification would cover this kinda thing, how can you say something like that, with what cooling,stock??? helmie has the big typhoon from Tt, its a reasonable temperature, speedfan and AsusProbe bothe report the same...... whats so hard to believe......
 
oh poo, but the point still stands, if the outside temperature drops to -2 C or whatever it was then a load of 10C isnt that hard to believe with external ventilation.... is it??
 
I thought ye of all clarification would cover this kinda thing, how can you say something like that, with what cooling,stock??? helmie has the big typhoon from Tt, its a reasonable temperature, speedfan and AsusProbe bothe report the same...... whats so hard to believe......
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1. Huh? :P
2. If you missed the various references made they can be found here,here. To his credit, ducting outdoor temps directly to the machine will allow for the temps as noted (which is what I do as well, keep the room at -10C where environmentally possible) however that's hardly what would constitute as "stock cooling" :P To state such would be incredibly misleading boarderlining on intentional deception :)

if the outside temperature drops to -2 C or whatever it was then a load of 10C isnt that hard to believe with external ventilation.... is it??
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In my first year of uni, i piped my athlonxp2100 to the outdoor temps (roughly -20C at night) in conjunction with a volcano12 running max rpm and yes those temps ARE indeed doable ... but i could hardly constitute that as "volcano12" being the cooling force behind it :)
 
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